Where's the evidence for my TI?

My focus group for 2018 was 5 boys :

2 x Cook Island Maori students, 1 x Fijian, 1 x Tongan and 1 x Maori.

EVIDENCE:  

 I looked at the 2017 term 4 reading results and found that the students were at the following reading levels:

2 reading at 9 - 9.5 yrs, 2 reading at 8.5 - 9 yrs and 1 reading at 9.5 to 10 years.

In addition the WFRC report back for our school showed that the levels of boys in general were lower than the cohort of the country.